That's really hard to say... first i would have to WHAT STATE YOUR IN... and for that matter WHAT COUNTRY YOUR IN AND if your BUYING SOMETHING, SELLING... if its EARN INCOME OR CAPITAL GAIN MONEY....
In order to properly answer this question, I'd have to know how much the tax is. However, all taxes are a percentage of the initial price, so to help the questioner out, let's assume that the tax is...